Android™ Requires Chilkat v11.7.0+

Audit a PDF First, Optimize Only If It Is Worth It

See more PDF Optimization Examples

Demonstrates deciding whether to rewrite a PDF at all. "audit" costs a fraction of a second and changes nothing, so a batch job can audit every file and optimize only those where enough would be saved. Here the threshold is a tenth of the file; a file already as small as it can be is left alone. Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  The PDF used in this example is available at watersense_accomplishments.pdf

    CkPdf pdf = new CkPdf();
    success = pdf.LoadFile("qa_data/pdf/watersense_accomplishments.pdf");
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        return;
        }

    CkJsonObject json = new CkJsonObject();
    CkJsonObject jsonOut = new CkJsonObject();
    success = pdf.Optimize("audit",json,jsonOut);
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        return;
        }

    int fileSize = jsonOut.IntOf("fileSize");
    int estimated = jsonOut.IntOf("estimatedSavings.total");
    Log.i(TAG, "fileSize:  " + String.valueOf(fileSize));
    Log.i(TAG, "estimated: " + String.valueOf(estimated));

    //  Only bother when at least a tenth of the file would go.
    if (estimated > (fileSize / 10)) {
        Log.i(TAG, "Worth optimizing.");
        success = pdf.Optimize("optimize",json,jsonOut);
        if (success == false) {
            Log.i(TAG, pdf.lastErrorText());
            return;
            }

        success = pdf.WriteFile("qa_output/watersense_optimized.pdf");
        if (success == false) {
            Log.i(TAG, pdf.lastErrorText());
            return;
            }

        Log.i(TAG, "bytesSaved: " + String.valueOf(jsonOut.IntOf("bytesSaved")));
        }
    else {
        Log.i(TAG, "Already small enough; left as it is.");
        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}